Re: Body Mass Calculator


vernon wrote:
"PeterB" <pkm@xxxxxxxxxxxxxxx> wrote in message
news:1146591318.850308.208680@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

vernon wrote:
"PeterB" <pkm@xxxxxxxxxxxxxxx> wrote in message
news:1146583245.523600.103600@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx

David Wright wrote:
In article <1146497093.261275.197450@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
PeterB <pkm@xxxxxxxxxxxxxxx> wrote:
http://nhlbisupport.com/bmi/

Please note that "body mass index" is not terribly useful for anyone
aside from sedentary populations. Just because it says you're
'overweight' doesn't mean you are, and just because it says you're NOT
overweight isn't an automatic reason to relax.

Nonsense. If you fall within the recommended ranges, you know you're
better off (statistically) than those who don't.

The heavier you are, the more it hurts when you fall and the harder it is
to
get up.

My stupidity being said, body mass calculator is often not usefull only
because of innacuracy.
For instance, I have large bones and have a better than normal muscle
mass.
When I use the "calculator", I am "fat"
When I use the water displacement, impedance measurement or professional
pinch test, I am very lean.

BMI is based on what's true for most people, but will overestimate body
fat in a few (probably less than 2%.) It will even underestimate body
fat in a few, mainly the elderly. So yes, constitutional differences
(even those related to ethnicity) can be a factor. A friend whose BMI
is over 30 is more fat than muscle, even though he exercises. He's an
example of the average person for whom BMI is a useful tool because it
tells him how he is doing.



BMI is a general term. I agree with what you say. My point was that BMI
can be estimated or presented in several different ways, often wrong.

I don't agree it's often wrong, unless you mean it can't attribute the
same percentage of body fat to any two people with the same BMI. That
would be true, for the obvious reason that it isn't designed to do
that. BMI simply describes body mass relative to an estimate of
adipose in a range of values for one purpose: to help you measure your
overall disease risk. If you say it's "often wrong" because two people
with the same BMI may have different absolute disease risks, then
you're making an UNDER statement because by that definition the BMI it
would ALWAYS be wrong. If it weren't accurate for most people, it
would be completely meaningless.


Same with exercise (your friend). Most people think running and walking and
treadmill is useful for body mass or weight loss. It is almost useless.
When doing aerobics the metabolism goes up for the length of the exercise
time plus, at max (max) 20 minutes before it actually dips below normal for
that person. Weights or "resistance" exercise usually creates a setup for
metabolism that lasts from 4 to 12 hours.

A 6K run is 1/2 a donut.

I agree: we overestimate exercise and underestimate dietary habits
when it comes to body fat. This is why my friend, despite exercising,
remains fat.

In any case calories, especially sugar and carbs have to be controlled.
Again all people are not the same. USUALLY carbs should not exceed 40% of
total calories. (counting carbs without any association to total calories
is where people go wrong)

Right, and that underscores the need for quality carbs.

.

Relevant Pages

  • Re: Body Mass Calculator
    ... PeterB wrote: ... body mass calculator is often not usefull only ... BMI is based on what's true for most people, ... fat in a few, mainly the elderly. ...
    (misc.health.alternative)
  • Re: Body Mass Calculator
    ... PeterB wrote: ... body mass calculator is often not usefull only ... BMI is based on what's true for most people, ... fat in a few, mainly the elderly. ...
    (misc.health.alternative)
  • Re: Body Mass Calculator
    ... vernon wrote: ... body mass calculator is often not ... BMI is based on what's true for most people, ... fat in a few, mainly the elderly. ...
    (misc.health.alternative)
  • Re: Body Mass Calculator
    ... body mass calculator is often not usefull only ... A friend whose BMI ... Same with exercise. ... especially sugar and carbs have to be controlled. ...
    (misc.health.alternative)
  • Re: Body Mass Calculator
    ... vernon wrote: ... body mass calculator is often not usefull ... fat in a few, mainly the elderly. ... A friend whose BMI ...
    (misc.health.alternative)